$\phi_0$-junction and Josephson diode effect in high-temperature superconductor
Abstract
Motivated by recent progress in both the Josephson diode effect (JDE) and the high-temperature Josephson junction, we propose to realize the JDE in an s-wave/d-wave/s-wave (s-d-s) superconductor junction and investigate the high-temperature superconducting order parameters. The interlayer coupling between s-wave and d-wave superconductors can induce an effective superconducting state, spontaneously breaking time-reversal symmetry. The asymmetric s-d interlayer couplings break the inversion symmetry. Remarkably, the breaking of these two symmetries leads to a -junction but does not generate JDE. We find that the emergence of the JDE in this junction depends on the rotational symmetry of the system. Although breaking rotational symmetry does not affect time-reversal and inversion symmetries, it can control the magnitude and polarity of diode efficiency. Furthermore, we propose observing C symmetry breaking controlled JDE through asymmetric Shapiro steps. Our work suggests a JDE mechanism that relies on high-temperature d-wave pairing, which could inversely contribute to a potential experimental method for detecting the unconventional pairing symmetry in superconductors.
Keywords
Cite
@article{arxiv.2410.06838,
title = {$\phi_0$-junction and Josephson diode effect in high-temperature superconductor},
author = {Guo-Liang Guo and Xiao-Hong Pan and Xin Liu},
journal= {arXiv preprint arXiv:2410.06838},
year = {2024}
}